I have a page located in an iframe of another page. It calls a js function like this:
function F(a)
{
parent.document.getElementById('A').value = a;[code]....
It results in page reloading. How can I prevent it? Previously I've used return false; and it worked. But not in this case.
I have a js function
function(id){
// do a postback here and get the id on the server side
}
I need to send the id to the server, how could I do this?
any way will do, using additional/hidden controls anything
I'm at my wits end on this one looked/Searched/Played/Experimented and I need your help if you can.This page is going to be primarily used on a mobile device using Win Mobile 5 Need to Accomplish:Prevent Postback(serverside) of Page using JavaScript (Postback's slow down the page on mobile device)
[code]...
I have custom control with ASP.Net validators.
writer.AddAttribute(HtmlTextWriterAttribute.Onclick, "javascript:return DoSmth();");
function DoSmth() {
var cBox = confirm("Are you sure?");
if (!cBox) {
return false;
}
else {
//Invoke validation
}
When I push button submit, I call confirm box. If I press cancel - all right. But if I press ok, I need to do validation. How can I stop postback and do valiadation?
I couldn't find something similar in SO.
In ASP.NET, is there any way that on cue I can cause a partial postback with Javascript in an UpdatePanel?
I tried __doPostBack() but it does a full postback. I can trick it with a dummy button and fire click() then handle the partial postback that way, but I want a more graceful way than trickery.
actually this code is working well in firfox mozila but it's not working in IE8
[code]....
here i want to prevent postback when answerlength == 0 ; but when answer length ==0 then it alert alert("u can't submit blank answer") message and postback to server io want to prevent it how i do ?
<asp:Button ID="btn" OnClientClick="if(confirm_delete()){
/* post back*/
}else{
return false;
};" OnClick="btnDelete_Click" runat="server" Text="delete"/>
I have this code but I cant do postback for it, im not sure how to?
is it:
<script type="text/javascript">
function CallServer() {
__doPostBack('not sure what goes here','or here');
}
</script>
[Code]....
I have an ASP.NET checkbox, and I want to run some javascript before it posts back.
Something like:
<asp:CheckBox ID="chkSelected" runat="server" AutoPostBack="True" OnCheckedChanged="chkSelected_CheckedChanged" />
but I want to run a JS confirm dialog when the user click it, and if they were UNCHECKING it, I'd like to ask them if they're sure, and if so, postback and run my serverside code. If they say No, don't postback at all.
Ive got on my aspx page button with code:
OnClick="save_Click"
Is it possible to execute javascipt before postback and if result is true then do postback and go to method save_click and if not just ignore it ?
Here is my scenario:
I have user controls within a master page and within a user control, I may have an update panel. I have the following bit of code I place within a usercontrol that maintains various control styling during partial postback i.e. those controls affected within by an asp update panel.
function pageLoad(sender, args) {
if (args.get_isPartialLoad()) {
$("select, span, input").uniform();
Indeed, when an update panel does its thing, the Fancy Dan styling is maintained. However, I have one gripe - when a 'large' partial postback occurs, occassionally you'll see the default, generic control styling reappear breifly and then the uniform kicks in to reapply the new fancy styles. Is there any way I can avoid seeing the nasty old, default, bland stylings?
How do i run a javascript event after a postback within an updatepanel
View 3 RepliesHow do i scroll to a panel within an updatepanel after i load the content
View 4 RepliesI have a simple page where I want to filter a ListBox based upon a value(s) in a textbox - both are in an UpdatePanel.This works correctly, however, after the postback the textbox had lost focus...so I set focus back in the page_load.Then I noticed that the cursor was now at the beginning of the text when I want it at the end so the user can carry on typing, so I added an onfocus(...) attribute to the textbox to set the value back to itself (see code below).This works the first two times, but then it stops setting focus to the textbox?
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ListTest.aspx.cs" Inherits="SalesForceTest.ListTest" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
[code]...
I have a component that determines a value on a postback event.
protected void Button_Click(object s, EventArgs e)
{
HiddenField.Value = 5;
}
There's more involved in the value of course, but HiddenField is an asp:HiddenField control with runat=server set. I have in my javascript:
var id = $("#<%= HiddenField.ClientID %>").val();
The code in the javascript is set to be run only after the postback has occured (a different client click event) for the purpose of passing the hidden field value via QueryString to another URL (since i can't do a response redirect on postbacks and the client wants it in a different page anyway).
I tried adding:
ScriptManager.RegisterHiddenField(HiddenField, "Value", string.Empty);
To a !Page.IsPostback section of code, but the ID is still not set when the javascript is run.
I have an ASP.NET page with Javascript. I have some checkboxes and I want to give the user time to check and uncheck more then one box before the postback... so when the user tick/untick a check box the postback happens after 5 seconds. How can I do this? tryed different methods found online but all incomplete or wrong.
View 1 RepliesI put the following javascript code inline but it doesn't trigger after the updatepanel is done with its postback:
function EndRequestHandler(sender, args) { alert("this should work"); }
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
I have a web form with textbox and button. I want after "ENTER" key click on textbox postbak form.I am using next code:
onkeypress=" if(event.keyCode==13)
{ alert(2);
WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions('ctl00$ContentPlaceHolder1$btnSearch', '', true, '', '', false, false));
alert(2);
return false;}
where WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions('ctl00$ContentPlaceHolder1$btnSearch', '', true, '', '', false, false));
is javascript code for button event onclick.I get two alerts, but postback doesnot happen.
the information of do postback details.
View 2 RepliesI'm sure this is fairly straightforward but i'm having trouble getting it to work. I want to add a javascript function to my page, but only when the page postsback. So I have a button that calls some server-side code, and when it is finished and the page is re-loading I want the javascript function to be called. Thinking about this i guess I could just add a hidden variable and set it when the button is clicked, but i think i'd rather just insert the javascript onto the page when it is loading back. Is this possible, or even a good way to do it? Edit: Okay this is my OnClick method in the C# code.
protected void Save(object sender, EventArgs e)
{
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", "<script type="text/javascript">alert('hello world');</script>");
EnforcementMatch(false);
EnforcementMatch(true);
ApplicationNotMatch();
ApplicationMatch();
Response.Redirect(Request.Url.ToString());
}
Another Edit: Just realised that the response.redirect at the bottom reloads my page cancelling out the code I put in, duh!
Is there any javascript event which is triggered on postback? If not, how can I run client side code immediately after or before a page postback?
View 5 RepliesI'm trying to do a javascript postback and then re-direct to a different page but it keeps posting back to the current page Here's my code
$(this).prepend('<a class="booknow2 sidelink sidelinkNew" href="javascript:__doPostBack('SetSess','')"><img src="../../images1/button/leftEdge.png" width="4" height="35" style="float:left; margin:0; padding:0;" alt="book now" /><img src="../../images1/button/rightEdge.png" width="4" height="35" style="float:right; margin:0; padding:0;" alt="book now" /><span>Check availability »</span></a>');
And here's my SetSess postback command
Sub SetSess()
Session("TenHolStDateNewCheck") = "%"
response.redirect("searchresults/default.aspx")
End Sub
I'm using Javascript to create a DIV element and open up a new page by using onclientclick. This works great. Now, I need to write to it from the server side and this element must be created before it is posted back.
How do I get the javascript to execute before the postback?
Currently, I have to press the button twice because the element doesn't exist to write too on the first click.
To be clear, I need this to execute before the "OnClick" of the button.
Update: It looks like the Javascript function is called before the postback but the element is not updated until I run the second postback.
Update: Unfortunately it is a bit more complicated then this.
I'm creating a div tag in javascript to open a new window. Inside the div tag, I'm using a databinding syntax <%=Preview%> so that I can get access to this element on the server side. From the server side, I'm injecting the code.
I'm thinking this may be a chicken-egg problem but not sure.
UPDATE!
It is not the Javascript not running first. It is the databinding mechanism which is reading the blank variable before I'm able to set it.
I have a treeview in a user control. I need to run a javascript function with every asynch postback to scroll the div it's in to the right position. I've got it working, but I think there has to be a "cleaner" way to do it. In the Page_Load function of the control, I have the following code. Is there a better way to do it?
ScriptManager.RegisterStartupScript(this.UpdatePanel1, this.GetType(), "key" + DateTime.Now.Ticks, "RestorePosition();", true);
For the benefit of anyone searching for this answer, here is what I finally did that worked. At the top of the ascx page, I have the following code:
<script type="text/javascript">
function pageLoad(sender, args) {
Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(SavePosition);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(RestorePosition);
}
function SavePosition(sender, args) {
document.getElementById('hdnScrollSaver').value = document.getElementById('reportTreeViewdiv').scrollTop;
}
function RestorePosition(sender, args) {
document.getElementById('reportTreeViewdiv').scrollTop = document.getElementById('hdnScrollSaver').value;
}
</script>
And then I wrapped the treeview in a div tag as follows:
<div class="reportTreeView" id="reportTreeViewdiv">
<asp:TreeView ID="TreeView1" runat="server" OnTreeNodePopulate="TreeView1_TreeNodePopulate"
OnSelectedNodeChanged="TreeView1_SelectedNodeChanged" PathSeparator="|" SkinID="ReportTreeView" />
</div>
I have a literal control in markup. I am generating html layout in C# and then set the text property of literal to the html.
StringBuilder sb = new StringBuilder()
sb.Append("my html.....");
lt.Tex = sb.ToString();
Some of these html elements need to post back and call a function on the server side. I googled and found a couple of posts using __doPotsBack, but it is not working. Below is how I am adding an image and adding onclick script.
sb.Append(string.Format("<img title="Add" src="images/Add.gif" onclick="javascript:__doPostBack('Add','');return false;"/> "));
It does cause postback, but Add function is not called. Additionally I want to pass some parameters to Add function.
I do not have access to the <body> tag because it is in masterpage. I want to trigger an automatic postback when the page load as:
<script type="text/javascript">
window.onscroll= __doPostBack("<%= button.ClientID %>", "");
</script>
where should I put this code? I get a Not implemented JS error if I place it just before the </asp:Content> tag.
PS: I need to trigger that postback because I want to populate an updatepanel when the page loads